Installation; Step 1: Mounting - Chamberlain LiftMaster Professional BG770 Installation And Maintenance Manual

Installation

Mounting
Step 1:
1 Layout the concrete pad as detailed in Figure 4. Be sure to locate electrical conduit inside the
hatched 14" x 13" area.
2 Excavate required area for pad and conduit. Pad depth should be below the frost line, or as
required by local codes.
3 Locate four 1/2" X 6" long L-bolts (not supplied) as shown in Figure 4. The L-bolts should
protrude 1 1/2" inches above the pad.
4 Pour concrete, insuring that the pad is level and above the ground line.
5 Allow the concrete to set at least two days before installing gate.
Figure 4: Concrete Pad Layout
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Installation
Doc 01-G0674
Rev D